STM32F303XD datasheet(131/173 Pages) STMICROELECTRONICS

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STM32F303xD STM32F303xE

Electrical characteristics

151

USB characteristics

Figure 47. USB timings: definition of data signal rise and fall time

Table 76. USB startup time

Symbol

Parameter

Max

Unit

tSTARTUP(1)

1. Guaranteed by design, not tested in production.

USB transceiver startup time

µs

Table 77. USB DC electrical characteristics

Symbol

Parameter

Conditions

Min.(1)

1. All the voltages are measured from the local ground potential.

Max.(1)

Unit

Input levels

VDD

USB operating voltage(2)

2. To be compliant with the USB 2.0 full-speed electrical specification, the USB_DP (D+) pin should be pulled

up with a 1.5 k

Ω resistor to a 3.0-to-3.6 V voltage range.

-3.0(3)

3. The STM32F303xD/E USB functionality is ensured down to 2.7 V but not the full USB electrical

characteristics which are degraded in the 2.7-to-3.0 V VDD voltage range.

3.6

VDI(4)

4. Guaranteed by design, not tested in production.

Differential input sensitivity

I(USB_DP, USB_DM)

0.2

VCM(4) Differential common mode range

Includes VDI range

0.8

2.5

VSE(4)

Single ended receiver threshold

1.3

2.0

Output levels

VOL

Static output level low

RL of 1.5 kΩ to 3.6 V(5)

5. RL is the load connected on the USB drivers.

-0.3

VOH

Static output level high

RL of 15 kΩ to VSS(5)

2.8

3.6

Table 78. USB: full-speed electrical characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Driver characteristics

Rise time(2)

CL = 50 pF

Fall time(2)

CL = 50 pF

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